77 lines
No EOL
1.6 KiB
C++
77 lines
No EOL
1.6 KiB
C++
#ifndef LOADER_H
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#define LOADER_H
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#include <memory>
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#include <string>
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#include <vector>
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#include "file_reader.h"
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#include <stdexcept>
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class Machine;
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using std::shared_ptr;
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using std::string;
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class Loader {
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public:
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Loader( shared_ptr<Machine> machine, string filename) : _machine(machine), _filename(filename) {
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_file_reader = std::make_shared<FileReader>(filename, std::ios::in);
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if (!_file_reader->good()) {
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throw std::runtime_error("Loader: failed to open file: " + filename);
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}
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}
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~Loader();
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enum class RecordType {
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HEADER,
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TEXT,
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MODIFICATION,
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END,
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UNKNOWN
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};
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struct HeaderMetadata {
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string program_name;
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int start_address;
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int length;
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};
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struct TextRecord {
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int start_address;
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std::vector<uint8_t> data;
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};
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struct ModificationRecord {
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int address; // Address to be modified
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int length; // Length in nibbles
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bool add; // true for +, false for -
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};
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struct EndRecord {
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int execution_start_address;
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};
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void load();
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private :
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static RecordType parseRecordType(char c);
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shared_ptr<Machine> _machine;
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string _filename;
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shared_ptr<FileReader> _file_reader;
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int _relocation_address;
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HeaderMetadata readHeader();
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TextRecord readTextRecord();
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ModificationRecord readModificationRecord();
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EndRecord readEndRecord();
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bool load_into_memory(int start_address, const std::vector<uint8_t>& data);
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void applyModification(const ModificationRecord& mod);
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};
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#endif // LOADER_H
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